Device for visually digitally reading to a binary code and its complement



Nov. 21, 1961 J. c. Kocl ET AL 3,010,101

DEVICE FOR VISUALLY DIGITALLY READING TO A BINARY CODE AND ITSCOMPLEMENT Filed Feb. 24, 1960 2 Sheets-Sheet 1 Nov. 21, 1961 J. c. KoclETAL 3,010,101

DEVICE FOR VISUALLY DIGITALLY READING To A BINARY CODE AND ITSCOMPLEMENT 2 Sheets-Sheet 2 Filed Feb. 24, 1960 INVENTOR.

United States Patent Oiice 3,010,101 Patented Nov. 21,' 1961 Thisinvention relates to a device for visually digitally reading to a binarycode and its complement. To this end the invention has for its objectthe provision of such a device which is relatively simple, inexpensivein manu.- facture and which is an improvement over prior art devices.

More specifically a principal object of the invention is to establish aplurality of circuits in different combinations between binary and itscomplement.

Other objects will appear hereinafter.

The invention consists in the novel combination and arrangement of partsto be `hereinafter described and claimed.

The invention will be best understood by reference to the accompanyingdrawings showing the preferred form of construction, and in which:

FIG. 1 is a perspective view of the invention;

FIG. 2 is a side elevational view of the same;

FIG. 3 is a sectional view taken substantially on line 3-3 of FIG. 2;

FIG. 4 is a binary and its complement table;

FIG. 5 is an elevational view of the face plate;

FIG. 6 is a plan view of a disc having a printed circuit on the facethereof;

FIG. 7 is a plan view of a thumb wheel embodied in the invention;

FIG. 8 is a plan View of a detent disc embodied in the invention;

FIG. 9 is a plan view of a -face plate embodied in the invention.

The several objects of this invention are accomplished by the preferredform of construction shown in the accompanying drawings.

In this connection, a face plate is indicated at 20. The face plate isconnected to a complementary face plate 21 by means of suitable bolts 22and is spaced therefrom by sleeves 23 `carried by the bolts 22. Theplates 20 and 21 are provided with aligned openings 24 ywhich receivetrunnions 25 yformed as an integral part of a hub 26. Mounted on thishub 26 is a thumb wheel 27 having on its peripheral edge 28 spaced apartknurls 29 to facilitate rotating the wheel 27 relative to the plates 20and 21. Carried by the wheel 27 on onekside thereof is a disc 30preferably formed of non-conductive material and having printed on theyouter face thereof a printed circuit '31 of a predetermined pattern.The disc 30 is rotatable with the wheel 27.

Formed on the peripheral edge of the wheel 27 are dats 32, there beingten of such ats. On such ilats there are y arranged in any suitable`manner digits 33 from 0 to 9, as

best seen in FIG. l. n

In the wheel 27 in 'opposite radialalignrnent with the digits aretapered openings 34; adapted to engage in these openings 34 are detents35 which are yieldably held in n such engagement by a spring plate 36,the plate 36 having openings 37 formed therein of a smaller diameterthan the diameter of the detents so as to have yieldable bearing gagingthe adjacent surface of the disc 31. Connected to these Contact fingers39 are conductors 40', the corresponding ,ends of which terminate yintoterminal fingers 41 to which conductor or circuit wires are connected.

As before stated, the printed circuit is of a predetermined pattern sodesigned as to produce the various combination binary and theircomplement circuits as dilineated in the table shown in FIG. 4, whichchart will now be described.

The digits which appear on the wheel 27 are shown in the left-handcolumn of thetable. The numerals which appear beneath the Word binaryidentify the binary contact fingers, which fingers, as shown in FIG. 2,)for clarity will likewise be niarkedby like numerals. The contact C isthe output contact, it being always in contact with the printed circuit31. The X shown on the table (FIG. 4) indicates a closed circuit and thedash indicates an open circuit.

The following two examples will illustrate the operation of the device.One familiar with the code can ascertain the relationship of a number tothe binary code circuit and its complement. Normally the thumb Wheel 27is located in zero position as shown in FIG. 7. In such position thecontact C is on the printed circuit jat the point C. Contacts 1, 2, 4and 3 on the binary side are on the non-conductive areas 31 of the disc30, which speciiic areas are indicated at 1b, 2b, 4b, and 8b. On thecomplementary side, contacts 1', 2', 4 and 8 are on thereonductivecircuit at points substantially indicated at l'c, Zc, 4c, and 8'c.

Rotation of the thumb wheel 27 with the arrow 20 (FIG. 5) registeringwith the digit -l-, the following results: From a reading of the codeddigit -l-, the coded binary and its complement will be ascertained andthe binary contacts 8, 4 and 2 will be on the non-conductive areas.Binary contact 1 will be on the conductive or printed circuit area,whereas the complement contact 1 will be on the non-conductive area ofthe disc 30 and complement contacts 2', 4 and 8 will be on theconductive or printed area of the printed circuit of the disc 30.

By this simple arrangement one having the binary code 0-9, by rotatingthe thumb wheel 27 to register the code digit with the arrow 20 (FIG.5), there will be established the binary and its complement circuitcorresponding t-o the code digit in .registration with such arrow.

Our invention is particularly useful in establishing a coded binarycircuit and its complement for sensing devices, Signal devices, and'manyother `devices or instruments under control by such circuits Bysuch adevice different combinations of binary circuits and their complementskmay be quickly and readily established through the use of code digits.

While we have illustrated and described the preferred form ofconstruction for carrying our invention into effect, y

this is capable of variation and modification without departing fromthe` spirit of the invention. We therefore do not Wish to be limited tothe precise details of construction set forth. but desire to availourselves of such variations and modifications as come within the scopeof the appended claims.

Having thus described'our invention, what we claim as new and desire toprotect by Letters Patent is:

l. A device forvisually digitally reading to a binary code and itscomplement comprising a pair of confronting spaced apart plates, a shaft`carried by said plates and extending transversely therebetween, one ofsaid plates having a plurality or" openings formed therein, a wheelmounted on said shaft between said plates and having a peripheral edgeportion extending beyond adjacent edges of said plateand engageable bythe finger of a hand for imparting rotation to thewheel, ardisc mountedon one side of said Wheel in confronting relation with the plate inwhich said openings are formed and having its louter surface dividedinto conductive and nen-conductive areas in a predetermined pattern,contact fingers carried by said one plate with end portions projectingthrough said openings into contact with said surface of said wheel toestablish a plurality of binary and their complementary circuits indifferent combinations depending upon the relative position between saidfingers and said surface of said disc, terminals carried at one edgeportion of said one plate and connected to said fingers, and means forreleasably holding Said Wheel in a predetermined position with respectto said plates.

2. The device dened in claim 1 characterized by the inclusion of spacedflats on the peripheral edge of the Wheel with each at having anidentifying number' thereon, and knurled portions between each of saidats.

References Cited in the le of this patent UNITED STATES PATENTS2,700,076 Goode Jan. 18, 1955 10 2,774,063 G-rinStead Dec. 11 19562,873,441 Miller Feb. 10, 1959

